./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:27:36,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:27:36,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:27:36,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:27:36,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:27:36,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:27:36,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:27:36,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:27:36,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:27:36,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:27:36,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:27:36,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:27:36,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:27:36,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:27:36,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:27:36,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:27:36,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:27:36,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:27:36,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:27:36,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:27:36,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:27:36,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:27:36,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:27:36,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:27:36,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:27:36,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:27:36,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:27:36,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:27:36,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:27:36,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:27:36,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:27:36,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:27:36,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:27:36,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:27:36,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:27:36,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:27:36,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:27:36,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:27:36,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:27:36,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:27:36,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:27:36,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 12:27:36,650 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:27:36,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:27:36,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:27:36,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:27:36,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:27:36,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:27:36,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:27:36,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:27:36,655 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:27:36,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:27:36,656 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:27:36,657 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:27:36,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:27:36,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:27:36,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:27:36,658 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:27:36,658 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:27:36,658 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 12:27:36,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:27:36,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:27:36,659 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:27:36,659 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:27:36,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:27:36,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:27:36,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:27:36,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:27:36,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:27:36,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:27:36,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:27:36,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:27:36,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2022-11-20 12:27:37,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:27:37,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:27:37,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:27:37,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:27:37,092 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:27:37,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-11-20 12:27:40,511 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:27:40,925 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:27:40,926 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-11-20 12:27:40,942 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/data/521e59ebc/37374569878c44bc97dbfe780a6ac050/FLAG5c12e9381 [2022-11-20 12:27:40,960 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/data/521e59ebc/37374569878c44bc97dbfe780a6ac050 [2022-11-20 12:27:40,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:27:40,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:27:40,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:27:40,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:27:40,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:27:40,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:27:40" (1/1) ... [2022-11-20 12:27:40,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493d7f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:40, skipping insertion in model container [2022-11-20 12:27:40,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:27:40" (1/1) ... [2022-11-20 12:27:40,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:27:41,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:27:41,700 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-11-20 12:27:41,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:27:41,789 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:27:41,871 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-11-20 12:27:41,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:27:42,022 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:27:42,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42 WrapperNode [2022-11-20 12:27:42,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:27:42,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:27:42,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:27:42,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:27:42,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,104 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-11-20 12:27:42,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:27:42,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:27:42,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:27:42,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:27:42,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:27:42,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:27:42,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:27:42,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:27:42,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (1/1) ... [2022-11-20 12:27:42,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:27:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:42,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:27:42,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:27:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:27:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:27:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:27:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:27:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 12:27:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:27:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 12:27:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 12:27:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:27:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:27:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:27:42,252 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:27:42,419 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:27:42,421 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:27:43,002 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:27:43,013 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:27:43,014 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-20 12:27:43,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:27:43 BoogieIcfgContainer [2022-11-20 12:27:43,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:27:43,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:27:43,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:27:43,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:27:43,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:27:40" (1/3) ... [2022-11-20 12:27:43,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20491ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:27:43, skipping insertion in model container [2022-11-20 12:27:43,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:42" (2/3) ... [2022-11-20 12:27:43,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20491ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:27:43, skipping insertion in model container [2022-11-20 12:27:43,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:27:43" (3/3) ... [2022-11-20 12:27:43,028 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2022-11-20 12:27:43,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:27:43,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-11-20 12:27:43,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:27:43,209 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 12:27:43,253 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 12:27:43,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 225 transitions, 458 flow [2022-11-20 12:27:43,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 225 transitions, 458 flow [2022-11-20 12:27:43,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-11-20 12:27:43,437 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-11-20 12:27:43,438 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-20 12:27:43,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1206 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-11-20 12:27:43,464 INFO L119 LiptonReduction]: Number of co-enabled transitions 15200 [2022-11-20 12:27:49,875 INFO L134 LiptonReduction]: Checked pairs total: 28792 [2022-11-20 12:27:49,875 INFO L136 LiptonReduction]: Total number of compositions: 219 [2022-11-20 12:27:49,886 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 93 transitions, 194 flow [2022-11-20 12:27:49,989 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1102 states, 858 states have (on average 3.3426573426573425) internal successors, (2868), 1101 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:50,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:27:50,027 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59aa5343, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:27:50,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-20 12:27:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 1102 states, 858 states have (on average 3.3426573426573425) internal successors, (2868), 1101 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 12:27:50,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:50,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 12:27:50,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 12:27:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash 896146, now seen corresponding path program 1 times [2022-11-20 12:27:50,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:50,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164928316] [2022-11-20 12:27:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164928316] [2022-11-20 12:27:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164928316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:50,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:50,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:27:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609309016] [2022-11-20 12:27:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:50,514 INFO L87 Difference]: Start difference. First operand has 1102 states, 858 states have (on average 3.3426573426573425) internal successors, (2868), 1101 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:50,724 INFO L93 Difference]: Finished difference Result 919 states and 1806 transitions. [2022-11-20 12:27:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 12:27:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:50,759 INFO L225 Difference]: With dead ends: 919 [2022-11-20 12:27:50,759 INFO L226 Difference]: Without dead ends: 913 [2022-11-20 12:27:50,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:50,771 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:50,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:27:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-20 12:27:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-11-20 12:27:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 753 states have (on average 2.3824701195219125) internal successors, (1794), 912 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1794 transitions. [2022-11-20 12:27:50,878 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1794 transitions. Word has length 3 [2022-11-20 12:27:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:50,879 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1794 transitions. [2022-11-20 12:27:50,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1794 transitions. [2022-11-20 12:27:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 12:27:50,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:50,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 12:27:50,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:27:50,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 12:27:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash 27754174, now seen corresponding path program 1 times [2022-11-20 12:27:50,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:50,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30043847] [2022-11-20 12:27:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:50,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:51,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30043847] [2022-11-20 12:27:51,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30043847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36963446] [2022-11-20 12:27:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:51,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:51,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:51,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:51,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:27:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:27:51,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:51,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:51,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36963446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:51,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:51,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 12:27:51,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424774956] [2022-11-20 12:27:51,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:51,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:27:51,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:51,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:27:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:27:51,291 INFO L87 Difference]: Start difference. First operand 913 states and 1794 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:51,497 INFO L93 Difference]: Finished difference Result 916 states and 1797 transitions. [2022-11-20 12:27:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:27:51,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 12:27:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:51,502 INFO L225 Difference]: With dead ends: 916 [2022-11-20 12:27:51,502 INFO L226 Difference]: Without dead ends: 916 [2022-11-20 12:27:51,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:27:51,504 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:51,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:27:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-20 12:27:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 916. [2022-11-20 12:27:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 756 states have (on average 2.376984126984127) internal successors, (1797), 915 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1797 transitions. [2022-11-20 12:27:51,552 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1797 transitions. Word has length 4 [2022-11-20 12:27:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:51,553 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1797 transitions. [2022-11-20 12:27:51,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1797 transitions. [2022-11-20 12:27:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:27:51,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:51,554 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-20 12:27:51,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:51,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:51,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 12:27:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2130258030, now seen corresponding path program 2 times [2022-11-20 12:27:51,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:51,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855675503] [2022-11-20 12:27:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 12:27:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:51,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855675503] [2022-11-20 12:27:51,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855675503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:51,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:51,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:27:51,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196166282] [2022-11-20 12:27:51,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:51,917 INFO L87 Difference]: Start difference. First operand 916 states and 1797 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:52,094 INFO L93 Difference]: Finished difference Result 862 states and 1691 transitions. [2022-11-20 12:27:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:52,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:27:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:52,101 INFO L225 Difference]: With dead ends: 862 [2022-11-20 12:27:52,102 INFO L226 Difference]: Without dead ends: 862 [2022-11-20 12:27:52,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:52,111 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:52,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:27:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-20 12:27:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-11-20 12:27:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 724 states have (on average 2.335635359116022) internal successors, (1691), 861 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1691 transitions. [2022-11-20 12:27:52,181 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1691 transitions. Word has length 7 [2022-11-20 12:27:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:52,182 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1691 transitions. [2022-11-20 12:27:52,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1691 transitions. [2022-11-20 12:27:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:27:52,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:52,183 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-20 12:27:52,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:27:52,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 12:27:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2130258028, now seen corresponding path program 1 times [2022-11-20 12:27:52,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:52,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327537083] [2022-11-20 12:27:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:52,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327537083] [2022-11-20 12:27:52,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327537083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:52,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276974580] [2022-11-20 12:27:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:52,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:52,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:52,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:52,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:27:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:27:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:52,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:52,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276974580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:52,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:52,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 12:27:52,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12955311] [2022-11-20 12:27:52,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:52,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:27:52,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:27:52,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:27:52,599 INFO L87 Difference]: Start difference. First operand 862 states and 1691 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:52,810 INFO L93 Difference]: Finished difference Result 868 states and 1697 transitions. [2022-11-20 12:27:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:27:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:27:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:52,816 INFO L225 Difference]: With dead ends: 868 [2022-11-20 12:27:52,817 INFO L226 Difference]: Without dead ends: 868 [2022-11-20 12:27:52,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:27:52,820 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:52,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:27:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-20 12:27:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-11-20 12:27:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 730 states have (on average 2.324657534246575) internal successors, (1697), 867 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1697 transitions. [2022-11-20 12:27:52,850 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1697 transitions. Word has length 7 [2022-11-20 12:27:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:52,855 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1697 transitions. [2022-11-20 12:27:52,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1697 transitions. [2022-11-20 12:27:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:27:52,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:52,857 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2022-11-20 12:27:52,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:53,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:53,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 12:27:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash 684673044, now seen corresponding path program 2 times [2022-11-20 12:27:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:53,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161250614] [2022-11-20 12:27:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:53,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:27:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161250614] [2022-11-20 12:27:53,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161250614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:53,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:53,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:27:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071323555] [2022-11-20 12:27:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:53,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:27:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:27:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:53,219 INFO L87 Difference]: Start difference. First operand 868 states and 1697 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:53,368 INFO L93 Difference]: Finished difference Result 845 states and 1672 transitions. [2022-11-20 12:27:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:27:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 12:27:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:53,374 INFO L225 Difference]: With dead ends: 845 [2022-11-20 12:27:53,374 INFO L226 Difference]: Without dead ends: 845 [2022-11-20 12:27:53,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:27:53,376 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:53,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 24 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:27:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-20 12:27:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2022-11-20 12:27:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 715 states have (on average 2.3384615384615386) internal successors, (1672), 844 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1672 transitions. [2022-11-20 12:27:53,410 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1672 transitions. Word has length 13 [2022-11-20 12:27:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:53,410 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 1672 transitions. [2022-11-20 12:27:53,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1672 transitions. [2022-11-20 12:27:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:27:53,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:53,412 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:53,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:27:53,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 12:27:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash 295590401, now seen corresponding path program 1 times [2022-11-20 12:27:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:53,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005809950] [2022-11-20 12:27:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:27:53,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:53,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005809950] [2022-11-20 12:27:53,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005809950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:53,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753511492] [2022-11-20 12:27:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:53,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:53,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:53,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:27:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:53,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:27:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:53,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:27:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:27:53,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:27:53,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753511492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:53,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:53,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-20 12:27:53,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279429804] [2022-11-20 12:27:53,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:53,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:27:53,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:27:53,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:27:53,948 INFO L87 Difference]: Start difference. First operand 845 states and 1672 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:54,096 INFO L93 Difference]: Finished difference Result 118 states and 197 transitions. [2022-11-20 12:27:54,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:27:54,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:27:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:54,097 INFO L225 Difference]: With dead ends: 118 [2022-11-20 12:27:54,098 INFO L226 Difference]: Without dead ends: 118 [2022-11-20 12:27:54,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:27:54,099 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:54,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 37 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:27:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-20 12:27:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-20 12:27:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 108 states have (on average 1.8240740740740742) internal successors, (197), 117 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 197 transitions. [2022-11-20 12:27:54,103 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 197 transitions. Word has length 16 [2022-11-20 12:27:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:54,104 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 197 transitions. [2022-11-20 12:27:54,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 197 transitions. [2022-11-20 12:27:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:27:54,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:54,105 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-20 12:27:54,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:54,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:54,306 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 12:27:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash 573368461, now seen corresponding path program 1 times [2022-11-20 12:27:54,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:54,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597833347] [2022-11-20 12:27:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:54,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:27:54,338 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:27:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:27:54,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:27:54,399 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:27:54,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-11-20 12:27:54,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-11-20 12:27:54,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-11-20 12:27:54,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-11-20 12:27:54,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-11-20 12:27:54,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-11-20 12:27:54,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-11-20 12:27:54,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-11-20 12:27:54,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-11-20 12:27:54,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-11-20 12:27:54,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-11-20 12:27:54,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (27 of 39 remaining) [2022-11-20 12:27:54,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-11-20 12:27:54,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-11-20 12:27:54,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-11-20 12:27:54,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-11-20 12:27:54,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-11-20 12:27:54,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-11-20 12:27:54,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-11-20 12:27:54,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-11-20 12:27:54,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-11-20 12:27:54,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-11-20 12:27:54,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-11-20 12:27:54,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-11-20 12:27:54,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-11-20 12:27:54,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-11-20 12:27:54,416 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-11-20 12:27:54,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-11-20 12:27:54,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-11-20 12:27:54,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-11-20 12:27:54,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-11-20 12:27:54,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-11-20 12:27:54,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-11-20 12:27:54,419 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-11-20 12:27:54,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-11-20 12:27:54,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-11-20 12:27:54,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-11-20 12:27:54,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-11-20 12:27:54,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-11-20 12:27:54,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:27:54,425 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-11-20 12:27:54,428 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:27:54,428 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 12:27:54,493 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:27:54,498 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 12:27:54,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 307 transitions, 632 flow [2022-11-20 12:27:54,498 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 307 transitions, 632 flow [2022-11-20 12:27:54,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-11-20 12:27:54,614 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-11-20 12:27:54,614 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-20 12:27:54,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2362 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-11-20 12:27:54,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 44960 [2022-11-20 12:28:02,694 INFO L134 LiptonReduction]: Checked pairs total: 97629 [2022-11-20 12:28:02,695 INFO L136 LiptonReduction]: Total number of compositions: 299 [2022-11-20 12:28:02,696 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 104 places, 137 transitions, 292 flow [2022-11-20 12:28:04,193 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33059 states, 30055 states have (on average 4.3542838130094825) internal successors, (130868), 33058 states have internal predecessors, (130868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:04,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:28:04,195 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59aa5343, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:28:04,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-11-20 12:28:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 33059 states, 30055 states have (on average 4.3542838130094825) internal successors, (130868), 33058 states have internal predecessors, (130868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 12:28:04,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:04,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 12:28:04,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1579680, now seen corresponding path program 1 times [2022-11-20 12:28:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635481942] [2022-11-20 12:28:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:04,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:04,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635481942] [2022-11-20 12:28:04,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635481942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:04,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:04,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:28:04,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633287219] [2022-11-20 12:28:04,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:04,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:28:04,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:04,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:28:04,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:04,405 INFO L87 Difference]: Start difference. First operand has 33059 states, 30055 states have (on average 4.3542838130094825) internal successors, (130868), 33058 states have internal predecessors, (130868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:05,304 INFO L93 Difference]: Finished difference Result 25758 states and 76106 transitions. [2022-11-20 12:28:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:28:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 12:28:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:05,660 INFO L225 Difference]: With dead ends: 25758 [2022-11-20 12:28:05,661 INFO L226 Difference]: Without dead ends: 25716 [2022-11-20 12:28:05,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:05,662 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:05,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:28:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25716 states. [2022-11-20 12:28:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25716 to 25716. [2022-11-20 12:28:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25716 states, 24038 states have (on average 3.160828687910808) internal successors, (75980), 25715 states have internal predecessors, (75980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25716 states to 25716 states and 75980 transitions. [2022-11-20 12:28:07,750 INFO L78 Accepts]: Start accepts. Automaton has 25716 states and 75980 transitions. Word has length 3 [2022-11-20 12:28:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:07,751 INFO L495 AbstractCegarLoop]: Abstraction has 25716 states and 75980 transitions. [2022-11-20 12:28:07,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 25716 states and 75980 transitions. [2022-11-20 12:28:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 12:28:07,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:07,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 12:28:07,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:28:07,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:07,753 INFO L85 PathProgramCache]: Analyzing trace with hash 48912774, now seen corresponding path program 1 times [2022-11-20 12:28:07,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:07,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810649558] [2022-11-20 12:28:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:07,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:07,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810649558] [2022-11-20 12:28:07,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810649558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443402921] [2022-11-20 12:28:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:07,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:07,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:07,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:07,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:28:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:07,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:28:07,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:07,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:08,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443402921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:08,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:08,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-20 12:28:08,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797269654] [2022-11-20 12:28:08,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:08,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:08,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:28:08,007 INFO L87 Difference]: Start difference. First operand 25716 states and 75980 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:08,422 INFO L93 Difference]: Finished difference Result 25719 states and 75983 transitions. [2022-11-20 12:28:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 12:28:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:08,719 INFO L225 Difference]: With dead ends: 25719 [2022-11-20 12:28:08,725 INFO L226 Difference]: Without dead ends: 25719 [2022-11-20 12:28:08,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:28:08,726 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:08,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:28:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25719 states. [2022-11-20 12:28:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25719 to 25719. [2022-11-20 12:28:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25719 states, 24041 states have (on average 3.1605590449648515) internal successors, (75983), 25718 states have internal predecessors, (75983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25719 states to 25719 states and 75983 transitions. [2022-11-20 12:28:10,022 INFO L78 Accepts]: Start accepts. Automaton has 25719 states and 75983 transitions. Word has length 4 [2022-11-20 12:28:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:10,022 INFO L495 AbstractCegarLoop]: Abstraction has 25719 states and 75983 transitions. [2022-11-20 12:28:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25719 states and 75983 transitions. [2022-11-20 12:28:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:28:10,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:10,023 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-20 12:28:10,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:10,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:10,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1109632032, now seen corresponding path program 2 times [2022-11-20 12:28:10,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:10,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612139726] [2022-11-20 12:28:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 12:28:10,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612139726] [2022-11-20 12:28:10,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612139726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:10,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:10,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:28:10,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249172629] [2022-11-20 12:28:10,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:10,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:28:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:28:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:10,288 INFO L87 Difference]: Start difference. First operand 25719 states and 75983 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:10,758 INFO L93 Difference]: Finished difference Result 24234 states and 71611 transitions. [2022-11-20 12:28:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:28:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:28:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:10,890 INFO L225 Difference]: With dead ends: 24234 [2022-11-20 12:28:10,890 INFO L226 Difference]: Without dead ends: 24234 [2022-11-20 12:28:10,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:10,892 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:10,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:28:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24234 states. [2022-11-20 12:28:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24234 to 24234. [2022-11-20 12:28:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24234 states, 22788 states have (on average 3.142487274003862) internal successors, (71611), 24233 states have internal predecessors, (71611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24234 states to 24234 states and 71611 transitions. [2022-11-20 12:28:11,985 INFO L78 Accepts]: Start accepts. Automaton has 24234 states and 71611 transitions. Word has length 7 [2022-11-20 12:28:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:11,986 INFO L495 AbstractCegarLoop]: Abstraction has 24234 states and 71611 transitions. [2022-11-20 12:28:11,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 24234 states and 71611 transitions. [2022-11-20 12:28:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:28:11,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:11,988 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-20 12:28:11,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:28:11,988 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1109632033, now seen corresponding path program 1 times [2022-11-20 12:28:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366011993] [2022-11-20 12:28:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:11,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:12,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:12,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366011993] [2022-11-20 12:28:12,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366011993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:12,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110163699] [2022-11-20 12:28:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:12,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:12,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:12,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:12,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:28:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:12,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:28:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:12,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110163699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:12,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:12,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 12:28:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96609317] [2022-11-20 12:28:12,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:28:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:28:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:28:12,312 INFO L87 Difference]: Start difference. First operand 24234 states and 71611 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:12,998 INFO L93 Difference]: Finished difference Result 24240 states and 71617 transitions. [2022-11-20 12:28:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:28:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:28:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:13,133 INFO L225 Difference]: With dead ends: 24240 [2022-11-20 12:28:13,133 INFO L226 Difference]: Without dead ends: 24240 [2022-11-20 12:28:13,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:28:13,134 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:13,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:28:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24240 states. [2022-11-20 12:28:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24240 to 24240. [2022-11-20 12:28:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24240 states, 22794 states have (on average 3.141923313152584) internal successors, (71617), 24239 states have internal predecessors, (71617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24240 states to 24240 states and 71617 transitions. [2022-11-20 12:28:14,097 INFO L78 Accepts]: Start accepts. Automaton has 24240 states and 71617 transitions. Word has length 7 [2022-11-20 12:28:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:14,098 INFO L495 AbstractCegarLoop]: Abstraction has 24240 states and 71617 transitions. [2022-11-20 12:28:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 24240 states and 71617 transitions. [2022-11-20 12:28:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:28:14,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:14,099 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2022-11-20 12:28:14,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:14,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:28:14,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1045269089, now seen corresponding path program 2 times [2022-11-20 12:28:14,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:14,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379585993] [2022-11-20 12:28:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:14,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:14,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379585993] [2022-11-20 12:28:14,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379585993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:14,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:14,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:28:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265116313] [2022-11-20 12:28:14,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:14,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:28:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:28:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:14,426 INFO L87 Difference]: Start difference. First operand 24240 states and 71617 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:14,949 INFO L93 Difference]: Finished difference Result 24217 states and 71592 transitions. [2022-11-20 12:28:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:28:14,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 12:28:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:15,113 INFO L225 Difference]: With dead ends: 24217 [2022-11-20 12:28:15,113 INFO L226 Difference]: Without dead ends: 24217 [2022-11-20 12:28:15,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:15,114 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:15,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:28:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24217 states. [2022-11-20 12:28:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24217 to 24217. [2022-11-20 12:28:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24217 states, 22779 states have (on average 3.1428947715000657) internal successors, (71592), 24216 states have internal predecessors, (71592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24217 states to 24217 states and 71592 transitions. [2022-11-20 12:28:16,285 INFO L78 Accepts]: Start accepts. Automaton has 24217 states and 71592 transitions. Word has length 13 [2022-11-20 12:28:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:16,286 INFO L495 AbstractCegarLoop]: Abstraction has 24217 states and 71592 transitions. [2022-11-20 12:28:16,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:16,287 INFO L276 IsEmpty]: Start isEmpty. Operand 24217 states and 71592 transitions. [2022-11-20 12:28:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:28:16,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:16,288 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:28:16,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash -268503077, now seen corresponding path program 1 times [2022-11-20 12:28:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:16,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087713596] [2022-11-20 12:28:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:16,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087713596] [2022-11-20 12:28:16,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087713596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538365646] [2022-11-20 12:28:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:16,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:16,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:16,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:28:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:28:16,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:16,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:28:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:16,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:16,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538365646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:16,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:16,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 12:28:16,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615498335] [2022-11-20 12:28:16,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:28:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:16,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:28:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:28:16,817 INFO L87 Difference]: Start difference. First operand 24217 states and 71592 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:17,362 INFO L93 Difference]: Finished difference Result 22917 states and 68238 transitions. [2022-11-20 12:28:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:28:17,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:28:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:17,461 INFO L225 Difference]: With dead ends: 22917 [2022-11-20 12:28:17,461 INFO L226 Difference]: Without dead ends: 22917 [2022-11-20 12:28:17,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:28:17,462 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 310 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:17,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 98 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:28:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22917 states. [2022-11-20 12:28:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22917 to 22917. [2022-11-20 12:28:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22917 states, 21659 states have (on average 3.150560967727042) internal successors, (68238), 22916 states have internal predecessors, (68238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22917 states to 22917 states and 68238 transitions. [2022-11-20 12:28:18,288 INFO L78 Accepts]: Start accepts. Automaton has 22917 states and 68238 transitions. Word has length 17 [2022-11-20 12:28:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:18,288 INFO L495 AbstractCegarLoop]: Abstraction has 22917 states and 68238 transitions. [2022-11-20 12:28:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 22917 states and 68238 transitions. [2022-11-20 12:28:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:28:18,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:18,290 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:18,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:18,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:18,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash -267946152, now seen corresponding path program 1 times [2022-11-20 12:28:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:18,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154443942] [2022-11-20 12:28:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:18,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:18,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:18,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154443942] [2022-11-20 12:28:18,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154443942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:18,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:18,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:28:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364974935] [2022-11-20 12:28:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:18,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:28:18,918 INFO L87 Difference]: Start difference. First operand 22917 states and 68238 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:19,475 INFO L93 Difference]: Finished difference Result 18429 states and 54807 transitions. [2022-11-20 12:28:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:28:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:19,538 INFO L225 Difference]: With dead ends: 18429 [2022-11-20 12:28:19,539 INFO L226 Difference]: Without dead ends: 18429 [2022-11-20 12:28:19,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:28:19,539 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 351 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:19,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 43 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:28:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18429 states. [2022-11-20 12:28:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18429 to 18429. [2022-11-20 12:28:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18429 states, 17750 states have (on average 3.087718309859155) internal successors, (54807), 18428 states have internal predecessors, (54807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18429 states to 18429 states and 54807 transitions. [2022-11-20 12:28:20,239 INFO L78 Accepts]: Start accepts. Automaton has 18429 states and 54807 transitions. Word has length 17 [2022-11-20 12:28:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:20,240 INFO L495 AbstractCegarLoop]: Abstraction has 18429 states and 54807 transitions. [2022-11-20 12:28:20,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 18429 states and 54807 transitions. [2022-11-20 12:28:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 12:28:20,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:20,241 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:28:20,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash 283596274, now seen corresponding path program 1 times [2022-11-20 12:28:20,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:20,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250492865] [2022-11-20 12:28:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:20,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:20,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:20,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250492865] [2022-11-20 12:28:20,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250492865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:20,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:20,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:28:20,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15275704] [2022-11-20 12:28:20,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:20,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:20,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:28:20,481 INFO L87 Difference]: Start difference. First operand 18429 states and 54807 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:21,503 INFO L93 Difference]: Finished difference Result 26123 states and 76743 transitions. [2022-11-20 12:28:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:21,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 12:28:21,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:21,608 INFO L225 Difference]: With dead ends: 26123 [2022-11-20 12:28:21,608 INFO L226 Difference]: Without dead ends: 26123 [2022-11-20 12:28:21,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:28:21,610 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 260 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:21,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 103 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:28:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26123 states. [2022-11-20 12:28:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26123 to 19889. [2022-11-20 12:28:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19889 states, 19234 states have (on average 3.112509098471457) internal successors, (59866), 19888 states have internal predecessors, (59866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19889 states to 19889 states and 59866 transitions. [2022-11-20 12:28:22,320 INFO L78 Accepts]: Start accepts. Automaton has 19889 states and 59866 transitions. Word has length 18 [2022-11-20 12:28:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:22,321 INFO L495 AbstractCegarLoop]: Abstraction has 19889 states and 59866 transitions. [2022-11-20 12:28:22,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19889 states and 59866 transitions. [2022-11-20 12:28:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 12:28:22,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:22,322 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:22,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:28:22,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:22,323 INFO L85 PathProgramCache]: Analyzing trace with hash 283596042, now seen corresponding path program 1 times [2022-11-20 12:28:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:22,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817488841] [2022-11-20 12:28:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:22,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:22,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:22,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817488841] [2022-11-20 12:28:22,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817488841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:22,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:22,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:28:22,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38206549] [2022-11-20 12:28:22,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:22,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:22,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:28:22,576 INFO L87 Difference]: Start difference. First operand 19889 states and 59866 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:23,165 INFO L93 Difference]: Finished difference Result 16792 states and 49280 transitions. [2022-11-20 12:28:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:28:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 12:28:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:23,226 INFO L225 Difference]: With dead ends: 16792 [2022-11-20 12:28:23,226 INFO L226 Difference]: Without dead ends: 16757 [2022-11-20 12:28:23,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:28:23,227 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 350 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:23,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 59 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:28:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16757 states. [2022-11-20 12:28:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16757 to 16456. [2022-11-20 12:28:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16456 states, 16138 states have (on average 3.018403767505267) internal successors, (48711), 16455 states have internal predecessors, (48711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16456 states to 16456 states and 48711 transitions. [2022-11-20 12:28:23,933 INFO L78 Accepts]: Start accepts. Automaton has 16456 states and 48711 transitions. Word has length 18 [2022-11-20 12:28:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:23,933 INFO L495 AbstractCegarLoop]: Abstraction has 16456 states and 48711 transitions. [2022-11-20 12:28:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 16456 states and 48711 transitions. [2022-11-20 12:28:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:28:23,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:23,935 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:23,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:28:23,935 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1743919404, now seen corresponding path program 1 times [2022-11-20 12:28:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054553981] [2022-11-20 12:28:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:23,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 12:28:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054553981] [2022-11-20 12:28:24,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054553981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031768317] [2022-11-20 12:28:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:24,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:24,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:28:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:24,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 12:28:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:28:24,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:28:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 12:28:24,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:28:24,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031768317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:24,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:28:24,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-11-20 12:28:24,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967540527] [2022-11-20 12:28:24,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:24,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:28:24,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:28:24,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:28:24,728 INFO L87 Difference]: Start difference. First operand 16456 states and 48711 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:25,215 INFO L93 Difference]: Finished difference Result 12701 states and 36413 transitions. [2022-11-20 12:28:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:25,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 12:28:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:25,250 INFO L225 Difference]: With dead ends: 12701 [2022-11-20 12:28:25,250 INFO L226 Difference]: Without dead ends: 12646 [2022-11-20 12:28:25,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:28:25,251 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 233 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:25,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 53 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:28:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12646 states. [2022-11-20 12:28:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12646 to 12266. [2022-11-20 12:28:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12266 states, 12111 states have (on average 2.9429444306828505) internal successors, (35642), 12265 states have internal predecessors, (35642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12266 states to 12266 states and 35642 transitions. [2022-11-20 12:28:25,797 INFO L78 Accepts]: Start accepts. Automaton has 12266 states and 35642 transitions. Word has length 21 [2022-11-20 12:28:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:25,798 INFO L495 AbstractCegarLoop]: Abstraction has 12266 states and 35642 transitions. [2022-11-20 12:28:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 12266 states and 35642 transitions. [2022-11-20 12:28:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:28:25,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:25,801 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:25,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 12:28:26,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:26,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:28:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1824240704, now seen corresponding path program 1 times [2022-11-20 12:28:26,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:26,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540768440] [2022-11-20 12:28:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:26,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:26,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540768440] [2022-11-20 12:28:26,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540768440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:26,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861630398] [2022-11-20 12:28:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:26,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:26,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:26,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:28:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:28:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:26,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-20 12:28:26,613 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:28:26,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:28:26,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 12:28:26,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 12:28:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 12:28:26,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:34,846 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_482 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_482) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-11-20 12:28:36,871 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_482 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_482) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-11-20 12:28:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2022-11-20 12:28:37,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861630398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:37,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:37,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-20 12:28:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544512404] [2022-11-20 12:28:37,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:28:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:28:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=5, NotChecked=38, Total=156 [2022-11-20 12:28:37,025 INFO L87 Difference]: Start difference. First operand 12266 states and 35642 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:53,085 WARN L233 SmtUtils]: Spent 14.04s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:29:07,152 WARN L233 SmtUtils]: Spent 14.04s on a formula simplification. DAG size of input: 23 DAG size of output: 16 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:29:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:09,923 INFO L93 Difference]: Finished difference Result 14733 states and 42389 transitions. [2022-11-20 12:29:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:29:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 12:29:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:09,979 INFO L225 Difference]: With dead ends: 14733 [2022-11-20 12:29:09,980 INFO L226 Difference]: Without dead ends: 14733 [2022-11-20 12:29:09,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=8, NotChecked=62, Total=342 [2022-11-20 12:29:09,981 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 340 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 608 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:09,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 174 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 509 Invalid, 0 Unknown, 608 Unchecked, 0.5s Time] [2022-11-20 12:29:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14733 states. [2022-11-20 12:29:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14733 to 11829. [2022-11-20 12:29:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11829 states, 11676 states have (on average 2.9333675916409727) internal successors, (34250), 11828 states have internal predecessors, (34250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11829 states to 11829 states and 34250 transitions. [2022-11-20 12:29:10,266 INFO L78 Accepts]: Start accepts. Automaton has 11829 states and 34250 transitions. Word has length 21 [2022-11-20 12:29:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:10,267 INFO L495 AbstractCegarLoop]: Abstraction has 11829 states and 34250 transitions. [2022-11-20 12:29:10,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 11829 states and 34250 transitions. [2022-11-20 12:29:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 12:29:10,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:10,268 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:10,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:10,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:29:10,468 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:29:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1773074537, now seen corresponding path program 1 times [2022-11-20 12:29:10,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:10,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000016125] [2022-11-20 12:29:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 12:29:10,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:10,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000016125] [2022-11-20 12:29:10,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000016125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:10,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790561733] [2022-11-20 12:29:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:10,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:10,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:10,807 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:10,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:29:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:29:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:10,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-20 12:29:11,344 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:29:11,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:29:11,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 12:29:11,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 12:29:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 12:29:11,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:23,502 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_547 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_547) |c_~#a~0.base|))) is different from false [2022-11-20 12:29:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2022-11-20 12:29:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790561733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:23,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:23,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-11-20 12:29:23,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725106357] [2022-11-20 12:29:23,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:23,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:29:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:29:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=76, Unknown=6, NotChecked=18, Total=132 [2022-11-20 12:29:23,613 INFO L87 Difference]: Start difference. First operand 11829 states and 34250 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:33,686 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 21 DAG size of output: 19 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:29:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:36,347 INFO L93 Difference]: Finished difference Result 13120 states and 37151 transitions. [2022-11-20 12:29:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:29:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 12:29:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:36,385 INFO L225 Difference]: With dead ends: 13120 [2022-11-20 12:29:36,385 INFO L226 Difference]: Without dead ends: 13088 [2022-11-20 12:29:36,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=83, Invalid=153, Unknown=8, NotChecked=28, Total=272 [2022-11-20 12:29:36,386 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 361 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:36,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 198 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 550 Invalid, 0 Unknown, 354 Unchecked, 0.5s Time] [2022-11-20 12:29:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2022-11-20 12:29:36,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 12205. [2022-11-20 12:29:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12205 states, 12052 states have (on average 2.918104878858281) internal successors, (35169), 12204 states have internal predecessors, (35169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12205 states to 12205 states and 35169 transitions. [2022-11-20 12:29:36,580 INFO L78 Accepts]: Start accepts. Automaton has 12205 states and 35169 transitions. Word has length 22 [2022-11-20 12:29:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:36,580 INFO L495 AbstractCegarLoop]: Abstraction has 12205 states and 35169 transitions. [2022-11-20 12:29:36,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12205 states and 35169 transitions. [2022-11-20 12:29:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 12:29:36,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:36,582 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 12:29:36,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:36,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_561d8ff0-c226-4102-95eb-d847d4052031/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:36,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-20 12:29:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:36,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1790439815, now seen corresponding path program 1 times [2022-11-20 12:29:36,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984022926] [2022-11-20 12:29:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:36,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:29:36,822 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:29:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:29:36,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:29:36,865 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:29:36,865 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-11-20 12:29:36,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-11-20 12:29:36,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-11-20 12:29:36,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-11-20 12:29:36,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-11-20 12:29:36,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-11-20 12:29:36,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-11-20 12:29:36,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-11-20 12:29:36,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-11-20 12:29:36,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2022-11-20 12:29:36,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-11-20 12:29:36,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (38 of 50 remaining) [2022-11-20 12:29:36,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-11-20 12:29:36,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-11-20 12:29:36,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-11-20 12:29:36,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-11-20 12:29:36,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-11-20 12:29:36,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-11-20 12:29:36,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-11-20 12:29:36,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-11-20 12:29:36,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-11-20 12:29:36,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-11-20 12:29:36,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-11-20 12:29:36,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-11-20 12:29:36,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-11-20 12:29:36,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-11-20 12:29:36,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-11-20 12:29:36,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-11-20 12:29:36,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-11-20 12:29:36,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-11-20 12:29:36,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-11-20 12:29:36,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-11-20 12:29:36,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-11-20 12:29:36,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-11-20 12:29:36,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-11-20 12:29:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-11-20 12:29:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-11-20 12:29:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-11-20 12:29:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-11-20 12:29:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-11-20 12:29:36,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-11-20 12:29:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-11-20 12:29:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-11-20 12:29:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-11-20 12:29:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-11-20 12:29:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-11-20 12:29:36,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-11-20 12:29:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-11-20 12:29:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-11-20 12:29:36,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-11-20 12:29:36,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:29:36,876 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:36,877 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:29:36,877 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 12:29:36,923 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 12:29:36,927 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 12:29:36,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 389 transitions, 808 flow [2022-11-20 12:29:36,927 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 389 transitions, 808 flow [2022-11-20 12:29:36,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-11-20 12:29:37,092 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-11-20 12:29:37,092 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-20 12:29:37,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3783 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-11-20 12:29:37,150 INFO L119 LiptonReduction]: Number of co-enabled transitions 87360 [2022-11-20 12:29:45,795 INFO L134 LiptonReduction]: Checked pairs total: 178482 [2022-11-20 12:29:45,795 INFO L136 LiptonReduction]: Total number of compositions: 376 [2022-11-20 12:29:45,798 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 134 places, 177 transitions, 384 flow